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drm: bridge: dw-hdmi: Don't forward HPD events to DRM core before attach

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Hotplug events should only be forwarded to the DRM core by the interrupt
handler when the bridge has been attached, otherwise the DRM device
pointer will be NULL, resulting in a crash.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Jose Abreu <joabreu@synopsys.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20170117082910.27023-7-laurent.pinchart+renesas@ideasonboard.com
This commit is contained in:
Laurent Pinchart 2017-01-17 10:28:56 +02:00 committed by Archit Taneja
parent 527b863f6a
commit ba5d7e6160
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/bridge/dw-hdmi.c
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@ -1805,7 +1805,8 @@ static irqreturn_t dw_hdmi_irq(int irq, void *dev_id)
if (intr_stat & HDMI_IH_PHY_STAT0_HPD) {
dev_dbg(hdmi->dev, "EVENT=%s\n",
phy_int_pol & HDMI_PHY_HPD ? "plugin" : "plugout");
drm_helper_hpd_irq_event(hdmi->bridge.dev);
if (hdmi->bridge.dev)
drm_helper_hpd_irq_event(hdmi->bridge.dev);
}
hdmi_writeb(hdmi, intr_stat, HDMI_IH_PHY_STAT0);